Automatic finger-latch elevator.



Patented Aug. 20, 1918.

C. WHITE, JR. AUTOMAHG HNGER LATCH ELEVATOR.

[\FPHCATlUN FILED MAY 6. $918k C s W viclecl' ears or lugs 6 and 7, each being provided with an aperture 8 and 9 for the recep tion of the usual bail-link C-C which is adapted to be connected to suitable hoisting mechanism. I i

It, will, be seenthat, when the coupling B rests on the upper face of the elevator, a portion of the fingers 18 and 19 will be under pressure of the weight of the string of casing, thereby eliminating any liability of the clamp becoming loose by the separation of the jaws, which often n'ieans the dropping oi the easing into the Well with serious results to the workmen.

By the arrangement and design of the locking mechanism the operation of opening the jaws is alsogreatlv simplified, for after the pressure has been relieved from the up per face of the elevator it is only necessary for the operator to grasp the outer endot' the jaw 13 with his left hand and the latch 15 with his right. hanch then a slight downward pressure with the righthand suilieient to raise the lingers l8 and 19 out or engagement with their respective recesses, also releases the two arms 10 and 13 and a pull in opposite directions with both hands will cause the elevator to swing open for. disengagement from the casing.

Having thus described my invention what I claim as new is:

l. in a casing or tubing elevaton the combination with semi-circular hinged jaws. of an arm carried by each of said jaws, one. of said arms beingprovided with an inclined portion. a recess provided in the upper face of each jaw. a latch pivoted to one of said ere as? arms and having fingers which 7 recesses when the elerater is i ing in securing the jaws in closed po it a hook portion provided on said: 1 .ing an inclined tace adapted ct with the inclined portion of the A1111 to i said latch when the arms are hron 'ht gether and cause the fingers to v respective recesses and shantile integral with the latch.

2. In a casing; or tubing elevator hination with semicircular hing an arm carried by each of said 'a provided in the upper zit-ice oi eztc inclined portion provided the up; e"- olt' one jaw adjacent the recess n the i. a latch pivoted to one of said are in efingers which rest in said the, elevator is closed, an inclined provided on. one of said arms, and a portion provided on saitl latch having; an clined portion adapted. to cooperate w h the inclined portion of the arm latch when the arms are brought to and cause the fingers to engage their rt 3 live recesses, the inclined portion on the cooperatin};- with one of said fingers to in raising the latch when the arms brought together. i

in witness whereof I set my ham at fix my filg'iizlll'llfl lli the presence oi tire scribing); witnesses. 

